Yes there is proof that a CP > Wiesco.. I will find the SAE article that compared most major brands. The 2 foremost things that make a CP better are the content of the alloy that resist hotspotting better and ring land design which was proven stronger under some circumstances...
Of course the circumstances are so extreme that the difference shouldn't be taken into consideration when buying one or the other. You are not going to be making 1000+hp so these conditions do not apply.


martin